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aaravchen's avatar
aaravchen
New Member
2 days ago

Unsupported Bitwarden export (kdfType: 1)

Still completely broken. If I can't import my existing vaults, I can't use 1Password.

For reference, this is the specific message it says to post to support:

Unable to import.

  • Unsupported Bitwarden export (kdfType: 1). Please contact support and attach this error message.

Error Code:

Session: KKHPERPBHFEORHVZLJGPW3N4LM

Time: 2026-05-17T01:19:15.770Z

At a guess, the Bitwarden KDF type is included in the JSON for some reason, and if you're using Argon2 (which you better be because PBKDF2 has been broken for almost 3 years now!) 1Password fails.

discussion

1 Reply

  • 1P_Dave's avatar
    1P_Dave
    Icon for Moderator rankModerator
    1 hour ago

    aaravchen​ 

    Welcome to the community! I've moved your comment into a new topic since the old thread has been inactive for some time. The error message that you're receiving typically occurs if you're trying to import a vault from Bitwarden that is using Argon2id. You'll need to change your KDF algorithm  to PBKDF2 in Bitwarden, and then import your data again. You can read more here: Move your data from Bitwarden to 1Password

    PBKDF2 has been broken for almost 3 years now!)

    PBKDF2 is not broken, can you share more more information on why you think that it is? In fact, 1Password itself uses PBKDF2-HMAC-SHA256 for key derivation which makes it harder for someone to repeatedly guess your 1Password account password: How PBKDF2 strengthens your 1Password account password

    -Dave